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Mock Exam Qn doubt

 
Greenhorn
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I got this Qn from the site www.examulator.com

code
--------------------------------
interface Skeleton{
public char getSize(int iSize);

}


public class Huskisson implements Skeleton{
int iSize=99;
public static void main(String argv[]){
new Huskisson();
}
Huskisson(){
int iSize=1;
System.out.println(getSize(iSize));

}

public int getSize(int iSize){
return iSize;
}
}
------------------------------------------
The output is Compiler Error. I thought the output will be compilation with output 1.
Can somebody explain?
 
Ranch Hand
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Compile and check it out buddy.
 
Ranch Hand
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Does your class implement the Skeleton interface well?

Hint: interface says the method to return char and you have implemented
it with int return type. return type must be same for overriding method
of a class, or implementing method of interface.

Covariant return: The overriding method may return same or subclass
of what the overridden method returns.

EDIT:
Covariant return doesn't apply to primitives. char can't be a return
type where int is required.


Thanks,
[ July 03, 2007: Message edited by: Chandra Bhatt ]
 
Ranch Hand
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Helo

I feel that the iSize variaable has already been defined as an instance variable and as a local variable of the constructor
 
Chandra Bhatt
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Originally posted by Juwonlo Ibigbami:
Helo

I feel that the iSize variaable has already been defined as an instance variable and as a local variable of the constructor



Both have different scope. One is instance variable and another is constructor
local variable. No problem in this regard.


Thanks,
 
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even if the method were implemented correctly, the output would not be 1.
There's shadowing occuring here.

By the way, Chandra: covariant returns an primitives ?

Yours,
Bu.


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